Information wants to be free, but you charge by the hour... In the world of network security, a "black hat" is a hacker who defeats computer systems for personal gain. These rogue data jockeys pit themselves against the most secure systems in the world for the thrill of it (and maybe to make a little money on the side). However, the most skilled hackers know it's not about getting there first; it's about ghosting in and out of the system without leaving a trace.